A comparative study of the glycaemic index of orange-fleshed sweet potato (Ipomoea batatas) with the indigenous sweet potato commonly consumed in Abeokuta metropolis, Ogun State, Nigeria

Background: Advocacy of orange-fleshed sweet potato (OFSP) consumption as an essential crop in many developing countries to alleviate vitamin A deficiency due its beta carotene bio-fortification. It is crucial assess glycaemic index (GI) compared the indigenous (ISP) for therapeutic meal planning. 
 Objective: This study aimed determine and compare GI commonly consumed Ogun State, Nigeria.
 Materials Method: OFSP ISP were obtained from a farmers' market at Abeokuta, Nigeria. Ten healthy individuals within age range 18 24 years recruited. Volunteers served with equivalent test foods (250g 200g ISP) give 50g available carbohydrates. The boiled potatoes plain after 11-12 hours overnight fast tested subject's blood glucose different times. incremental area under curve (IAUC) was determined using Microsoft Excel, calculated. Statistical Package Social Sciences used calculate mean, standard deviation, correlation. tests significant p ≤ 0.05.
 Results: had greater carbohydrate content (24.33g±0.20) than (18.87g±0.26). mean 81.36g±7.17, while that 85.50g±7.26. There no difference (p>0.05) between 30, 60, 120 minutes, whereas found (CI-95%) OFSP, ISP, 90 minutes.
 Conclusion: state have high GI, although lower ISP. However, values these not significantly different.